Equity (Tables)

3 Months Ended

Mar. 31, 2015

Equity [Abstract]

Common Stock [Table Text Block]

The following is a summary of the changes in our common shares issued for the Current Quarter and the Prior Quarter:

	Three Months Ended March 31,
	2015	2014
	(in thousands)
Shares issued as of January 1	664,944	666,192
Restricted stock issuances (net of forfeitures and cancellations)(a)	151	(1,236	)
Stock option exercises	14	259
Shares issued as of March 31	665,109	665,215

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(a) In the second quarter of 2013, we began granting restricted stock units (RSUs) in lieu of restricted stock awards (RSAs) to non-employee directors and employees. Shares of common stock underlying RSUs are issued when the units vest, whereas shares of common stock are issued on the date the RSAs are granted. We refer to RSAs and RSUs collectively as restricted stock.

Schedule of Stock by Class [Table Text Block]

The following reflects the shares outstanding of our preferred stock for the Current Quarter and the Prior Quarter:

	5.75%	5.75% (A)	4.50%	5.00% (2005B)
	(in thousands)
Shares outstanding as of January 1, 2015 and 2014 and shares outstanding as of March 31, 2015 and 2014	1,497	1,100	2,559	2,096

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

For the Current Quarter and the Prior Quarter, changes in accumulated other comprehensive income (loss) by component, net of tax, are detailed below.

	Cash Flow Hedges			Investments			Net Change
	($ in millions)
Balance, December 31, 2014	$	(143	)	$	—		$	(143	)
Other comprehensive income before reclassifications	(1		)	—			(1		)
Amounts reclassified from accumulated other comprehensive income	10			—			10
Net other comprehensive income	9			—			9
Balance, March 31, 2015	$	(134	)	$	—		$	(134	)
Balance, December 31, 2013	$	(167	)	$	5		$	(162	)
Other comprehensive income before reclassifications	3			—			3
Amounts reclassified from accumulated other comprehensive income	11			(5		)	6
Net other comprehensive income	14			(5		)	9
Balance, March 31, 2014	$	(153	)	$	—		$	(153	)

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

For the Current Quarter and the Prior Quarter, amounts reclassified from accumulated other comprehensive income (loss), net of tax, into the condensed consolidated statements of operations are detailed below.

Details About Accumulated Other Comprehensive Income (Loss) Components	Affected Line Item in the Statement Where Net Income is Presented	Amounts Reclassified
		($ in millions)
Three Months Ended March 31, 2015
Net losses on cash flow hedges:
Commodity contracts	Oil, natural gas and NGL revenues	$	10
Total reclassifications for the period, net of tax		$	10
Three Months Ended March 31, 2014
Net losses on cash flow hedges:
Commodity contracts	Oil, natural gas and NGL revenues	$	11
Investments:
Sales of investments	Net gain on sales of investments	(5		)
Total reclassifications for the period, net of tax		$	6

Distributions Made to Limited Partner, by Distribution [Table Text Block]

For the Current Quarter and the Prior Quarter, the Trust declared and paid the following distributions:

Production Period	Distribution Date	Cash Distribution per Common Unit		Cash Distribution per Subordinated Unit
September 2014 – November 2014	March 2, 2015	$	0.4496	$	—
September 2013 – November 2013	March 3, 2014	$	0.6624	$	—